1 files changed, 19 insertions, 59 deletions

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 2ee0d070095a..316bfaa80872 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -60,48 +60,21 @@
 
 #define DRV_VERSION "0.05"
 
-struct m41t80_chip_info {
-        const char *name;
-        u8 features;
-};
-
-static const struct m41t80_chip_info m41t80_chip_info_tbl[] = {
-        {
-                .name           = "m41t80",
-                .features       = 0,
-        },
-        {
-                .name           = "m41t81",
-                .features       = M41T80_FEATURE_HT,
-        },
-        {
-                .name           = "m41t81s",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
-        {
-                .name           = "m41t82",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
-        {
-                .name           = "m41t83",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
-        {
-                .name           = "m41st84",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
-        {
-                .name           = "m41st85",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
-        {
-                .name           = "m41st87",
-                .features       = M41T80_FEATURE_HT | M41T80_FEATURE_BL,
-        },
+static const struct i2c_device_id m41t80_id[] = {
+        { "m41t80", 0 },
+        { "m41t81", M41T80_FEATURE_HT },
+        { "m41t81s", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { "m41t82", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { "m41t83", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL },
+        { }
 };
+MODULE_DEVICE_TABLE(i2c, m41t80_id);
 
 struct m41t80_data {
-        const struct m41t80_chip_info *chip;
+        u8 features;
         struct rtc_device *rtc;
 };
 
@@ -208,7 +181,7 @@ static int m41t80_rtc_proc(struct device *dev, struct seq_file *seq)
         struct m41t80_data *clientdata = i2c_get_clientdata(client);
         u8 reg;
 
-        if (clientdata->chip->features & M41T80_FEATURE_BL) {
+        if (clientdata->features & M41T80_FEATURE_BL) {
                 reg = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS);
                 seq_printf(seq, "battery\t\t: %s\n",
                            (reg & M41T80_FLAGS_BATT_LOW) ? "exhausted" : "ok");
@@ -759,10 +732,9 @@ static struct notifier_block wdt_notifier = {
 static int m41t80_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
-        int i, rc = 0;
+        int rc = 0;
         struct rtc_device *rtc = NULL;
         struct rtc_time tm;
-        const struct m41t80_chip_info *chip;
         struct m41t80_data *clientdata = NULL;
 
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C
@@ -774,19 +746,6 @@ static int m41t80_probe(struct i2c_client *client,
         dev_info(&client->dev,
                  "chip found, driver version " DRV_VERSION "\n");
 
-        chip = NULL;
-        for (i = 0; i < ARRAY_SIZE(m41t80_chip_info_tbl); i++) {
-                if (!strcmp(m41t80_chip_info_tbl[i].name, client->name)) {
-                        chip = &m41t80_chip_info_tbl[i];
-                        break;
-                }
-        }
-        if (!chip) {
-                dev_err(&client->dev, "%s is not supported\n", client->name);
-                rc = -ENODEV;
-                goto exit;
-        }
-
         clientdata = kzalloc(sizeof(*clientdata), GFP_KERNEL);
         if (!clientdata) {
                 rc = -ENOMEM;
@@ -802,7 +761,7 @@ static int m41t80_probe(struct i2c_client *client,
         }
 
         clientdata->rtc = rtc;
-        clientdata->chip = chip;
+        clientdata->features = id->driver_data;
         i2c_set_clientdata(client, clientdata);
 
         /* Make sure HT (Halt Update) bit is cleared */
@@ -811,7 +770,7 @@ static int m41t80_probe(struct i2c_client *client,
                 goto ht_err;
 
         if (rc & M41T80_ALHOUR_HT) {
-                if (chip->features & M41T80_FEATURE_HT) {
+                if (clientdata->features & M41T80_FEATURE_HT) {
                         m41t80_get_datetime(client, &tm);
                         dev_info(&client->dev, "HT bit was set!\n");
                         dev_info(&client->dev,
@@ -843,7 +802,7 @@ static int m41t80_probe(struct i2c_client *client,
                 goto exit;
 
 #ifdef CONFIG_RTC_DRV_M41T80_WDT
-        if (chip->features & M41T80_FEATURE_HT) {
+        if (clientdata->features & M41T80_FEATURE_HT) {
                 rc = misc_register(&wdt_dev);
                 if (rc)
                         goto exit;
@@ -879,7 +838,7 @@ static int m41t80_remove(struct i2c_client *client)
         struct rtc_device *rtc = clientdata->rtc;
 
 #ifdef CONFIG_RTC_DRV_M41T80_WDT
-        if (clientdata->chip->features & M41T80_FEATURE_HT) {
+        if (clientdata->features & M41T80_FEATURE_HT) {
                 misc_deregister(&wdt_dev);
                 unregister_reboot_notifier(&wdt_notifier);
         }
@@ -897,6 +856,7 @@ static struct i2c_driver m41t80_driver = {
         },
         .probe = m41t80_probe,
         .remove = m41t80_remove,
+        .id_table = m41t80_id,
 };
 
 static int __init m41t80_rtc_init(void)